diff --git a/src/sccp.hrl b/src/sccp.hrl
new file mode 100644
index 0000000..26d5caa
--- /dev/null
+++ b/src/sccp.hrl
@@ -0,0 +1,60 @@
+
+% Table 1 / Q.713 - SCCP Message Types
+-define(SCCP_MSGT_CR,		1).	% Connection request
+-define(SCCP_MSGT_CC,		2).	% Connection confirm
+-define(SCCP_MSGT_CREF,		3).	% Connection refused
+-define(SCCP_MSGT_RLSD,		4).	% Released
+-define(SCCP_MSGT_RLC,		5).	% Release complete
+-define(SCCP_MSGT_DT1,		6).	% Data form 1
+-define(SCCP_MSGT_DT2,		7).	% Data form 2
+-define(SCCP_MSGT_AK,		8).	% Data acknowledgement
+-define(SCCP_MSGT_UDT,		9).	% Unitdata
+-define(SCCP_MSGT_UDTS,		10).	% Unitdata service
+-define(SCCP_MSGT_ED,		11).	% Expedited data
+-define(SCCP_MSGT_EA,		12).	% Expedited data ack
+-define(SCCP_MSGT_RSR,		13).	% Reset Request
+-define(SCCP_MSGT_RSC,		14).	% Reset Confirmation
+-define(SCCP_MSGT_ERR,		15).	% Protocol data unit error
+-define(SCCP_MSGT_IT,		16).	% Inactivity test
+-define(SCCP_MSGT_XUDT,		17).	% Extended unitdata
+-define(SCCP_MSGT_XUDTS,	18).	% Extended unitdata service
+-define(SCCP_MSGT_LUDT,		19).	% Long unitdata
+-define(SCCP_MSGT_LUDTS,	20).	% Long unitdata service
+
+% Table 2 / Q.713 - SCCP parameter name codes
+-define(SCCP_PNC_END_OF_OPTIONAL,		0).
+-define(SCCP_PNC_DESTINATION_LOCAL_REFERENCE,	1).
+-define(SCCP_PNC_SOURCE_LOCAL_REFERENCE,	2).
+-define(SCCP_PNC_CALLED_PARTY_ADDRESS,		3).
+-define(SCCP_PNC_CALLING_PARTY_ADDRESS,		4).
+-define(SCCP_PNC_PROTOCOL_CLASS,		5).
+-define(SCCP_PNC_SEGMENTING,			6).
+-define(SCCP_PNC_RECEIVE_SEQ_NUMBER,		7).
+-define(SCCP_PNC_SEQUENCING,			8).
+-define(SCCP_PNC_CREDIT,			9).
+-define(SCCP_PNC_RELEASE_CAUSE,			10).
+-define(SCCP_PNC_RETURN_CAUSE,			11).
+-define(SCCP_PNC_RESET_CAUSE,			12).
+-define(SCCP_PNC_ERROR_CAUSE,			13).
+-define(SCCP_PNC_REFUSAL_CAUSE,			14).
+-define(SCCP_PNC_DATA,				15).
+-define(SCCP_PNC_SEGMENTATION,			16).
+-define(SCCP_PNC_HOP_COUNTER,			17).
+-define(SCCP_PNC_IMPORTANCE,			18).
+-define(SCCP_PNC_LONG_DATA,			19).
+
+
+% a single parsed SCCP message
+-record(sccp_msg, {
+	msg_type,
+	parameters
+	}).
+
+
+% a primitive how it is used inside the SCCP stack and to the user
+-record(primitive, {
+	  subsystem,
+	  gen_name,
+	  spec_name,
+	  parameters
+	}).